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Rate And Regulatory Matters (Tables)
 12 Months Ended
Dec. 31, 2024
Schedule of Regulatory Assets [Table Text Block]
Entergy
20242023
 (In Millions)
Pension & postretirement costs (Note 11 - Qualified Pension Plans, Other Postretirement Benefits, and Non-Qualified Pension Plans) (a)
$1,387.6 $1,655.5 
Asset retirement obligation - recovery dependent upon timing of decommissioning of nuclear units or shutdown of non-nuclear power plants and solar facilities (Note 9) (a)
1,358.7 1,285.0 
Removal costs (Note 9)
1,107.6 1,010.7 
Storm damage costs, including hurricane costs - recovered through securitization and retail rates (Note 2 - Storm Cost Recovery Filings with Retail Regulators and Note 5 - Securitization Bonds)
547.3 536.9 
Qualified pension settlement cost deferral - recovered through June 2047 (Note 11 - Qualified Pension Settlement Cost)
227.1 250.9 
Retail rate deferrals - recovered through formula rates or rate riders as rates are redetermined by retail regulators
195.1 248.6 
Retired electric and gas meters - recovered through retail rates as determined by retail regulators (Note 2 - Retail Rate Proceedings)
135.7 153.8 
Deferred COVID-19 costs - recovered through retail rates as determined by retail regulators (Note 2 - Retail Rate Proceedings)
104.0 118.0 
Unamortized loss on reacquired debt - recovered over term of debt
57.9 63.1 
Advanced metering system surcharge for residential customers - recovered through December 2029
39.7 20.2 
Formula rate plan historical year rate adjustment (Note 2 - Retail Rate Proceedings) (b)
15.5 — 
Pension & postretirement benefits expense deferral - recovered through retail rates (Note 2 - Retail Rate Proceedings and Note 11 - Entergy Texas Reserve)
15.0 32.7 
Rate case depreciation relate back deferral - recovered over a six-month period beginning January 2024 (Note 2 - Retail Rate Proceedings)
— 27.6 
Opportunity sales - (Note 2 - Entergy Arkansas Opportunity Sales Proceeding) (b)
— 131.8 
Other99.7 134.6 
Entergy Total (c)
$5,290.9 $5,669.4 
Schedule of Regulatory Liabilities [Table Text Block]
Entergy
20242023
(In Millions)
Unrealized gains on nuclear decommissioning trust funds (Note 16) (a)
$2,262.5 $1,826.2 
Securitization financing savings obligation (Note 3)
371.3 405.2 
Retail rate rider over-recovery - refunded through formula rate or rate riders as rates are redetermined by retail regulators
164.9 142.7 
Credits from resolution of the 2016-2018 IRS audit (Note 3)
163.3 98.0 
Customer rate credits from global stipulated settlement with the LPSC - returned to customers September 2024 through August 2026 (Note 2)
121.7 — 
Refund from System Energy settlement with the LPSC - to be returned to customers January 2025 through August 2027 (Note 2)
75.8 — 
Deferred tax equity partnership earnings (Note 1)
69.9 57.9 
Vidalia purchased power agreement (Note 8)
67.4 82.5 
Refund from System Energy settlement with the City Council - returned to customers over a 25-year period beginning September 2024 (Note 2)
64.7 — 
Shorter-term financing interest earnings (Note 2 - Retail Rate Proceedings) (a)
48.9 36.8 
Entergy Arkansas’s accumulated accelerated Grand Gulf amortization - will be returned to customers when approved by the APSC and the FERC
44.4 44.4 
Asset retirement obligation - return to customers dependent upon timing of decommissioning (Note 9) (a)
40.9 44.3 
Refund from System Energy settlement with the City Council - return to customers to be determined (Note 2)
32.0 — 
Refund from System Energy settlement with the APSC - refunded through a rate rider as rates are re-determined periodically (Note 2)
8.2 93.0 
Complaints against System Energy - potential future refunds (Note 2)
— 177.9 
Other75.2 108.0 
Entergy Total (b)
$3,611.1 $3,116.9 
Entergy Louisiana [Member]  
Schedule of Regulatory Assets [Table Text Block]
Entergy Louisiana
 20242023
 (In Millions)
Asset retirement obligation - recovery dependent upon timing of decommissioning of nuclear units or shutdown of non-nuclear power plants (Note 9) (a)
$421.5 $408.7 
Pension & postretirement costs (Note 11 - Qualified Pension Plans and Non-Qualified Pension Plans) (a)
367.7 412.0 
Removal costs (Note 9)
323.2 262.3 
Storm damage costs, including hurricane costs - recovered through securitization and retail rates (Note 2 - Storm Cost Recovery Filings with Retail Regulators)
226.6 202.6 
Qualified pension settlement cost deferral - recovered through June 2047 (Note 11 - Qualified Pension Settlement Cost)
111.4 123.0 
Retired electric and gas meters - recovered over a 22-year period through July 2041
78.5 83.2 
Deferred COVID-19 costs - recovery period to be determined (Note 2 - Retail Rate Proceedings) (a)
47.8 47.8 
Unamortized loss on reacquired debt - recovered over term of debt
21.7 23.4 
Other48.5 85.9 
Entergy Louisiana Total (c)
$1,646.9 $1,648.9 
Schedule of Regulatory Liabilities [Table Text Block]
Entergy Louisiana
 20242023
 (In Millions)
Unrealized gains on nuclear decommissioning trust funds (Note 16) (a)
$798.4 $644.0 
Securitization financing savings obligation (Note 3)
371.3 405.2 
Customer rate credits from global stipulated settlement with the LPSC - returned to customers September 2024 through August 2026 (Note 2)
121.7 — 
Retail rate rider over-recovery - refunded through rate riders as rates are redetermined annually
96.3 86.4 
Refund from System Energy settlement with the LPSC - to be returned to customers January 2025 through August 2027 (Note 2)
75.8 — 
Vidalia purchased power agreement (Note 8)
67.4 82.5 
Shorter-term financing interest earnings (Note 2 - Retail Rate Proceedings) (a)
48.9 36.8 
Asset retirement obligation - return to customers dependent upon timing of decommissioning (Note 9) (a)
40.9 44.3 
Hurricane Ida insurance proceeds - returned to customers August 2024 to July 2025
26.0 32.3 
Credits from resolution of the 2016-2018 IRS audit - returned to customers September 2024 through August 2025 (Note 3)
25.3 38.0 
Sale-leaseback and depreciation refunds - returned to customers September 2023 through August 2024
— 14.1 
Other21.7 24.1 
Entergy Louisiana Total (b)
$1,693.7 $1,407.7 
Schedule of Deferred Fuel Costs [Table Text Block] The table below shows the amount of deferred fuel costs as of December 31, 2024 and 2023 that each Utility operating company expects to recover (or return to customers) through fuel mechanisms, subject to subsequent regulatory review.
 20242023
 (In Millions)
Entergy Arkansas
($45.2)($88.3)
Entergy Louisiana (a) (b)$163.4 $192.9 
Entergy Mississippi($126.3)($130.6)
Entergy New Orleans (a) (b)$8.0 $10.2 
Entergy Texas($59.3)$139.0 

(a)Includes $168.1 million in both years for Entergy Louisiana and $4.1 million in both years for Entergy New Orleans of fuel, purchased power, and capacity costs, which do not currently earn a return on investment and whose recovery periods are indeterminate but are expected to be recovered over a period greater than twelve months.
(b)Includes $0.7 million at Entergy Louisiana and $4.9 million at Entergy New Orleans as of December 31, 2024 of deferred fuel assets related to the respective natural gas distribution businesses classified as held for sale and included within “Current assets held for sale” on the respective consolidated balance sheets. See Note 14 to the financial statements for further discussion of the planned sale of the Entergy New Orleans and Entergy Louisiana natural gas distribution businesses and the classification as held for sale.
Opportunity Sales Proceeding [Table Text Block] Refunds and interest in the following amounts were paid by Entergy Arkansas to the other operating companies in December 2018:
 Total refunds including interest
Payment/(Receipt)
 (In Millions)
PrincipalInterestTotal
Entergy Arkansas$68$67$135
Entergy Louisiana($30)($29)($59)
Entergy Mississippi($18)($18)($36)
Entergy New Orleans($3)($4)($7)
Entergy Texas($17)($16)($33)
Entergy New Orleans [Member]  
Schedule of Regulatory Assets [Table Text Block]
Entergy New Orleans
 20242023
 (In Millions)
Removal costs (Note 9)
$62.5 $61.1 
Pension & postretirement costs (Note 11 - Qualified Pension Plans, Other Postretirement Benefits, and Non-Qualified Pension Plans) (a)
22.9 41.4 
Retired electric and gas meters - recovered over a 12-year period through July 2031 (b)
13.5 15.5 
Gas cross-boring costs - recovered through formula rates as rates are redetermined by retail regulators
11.9 10.9 
Qualified pension settlement cost deferral - recovered through June 2047 (Note 11 - Qualified Pension Settlement Cost)
10.8 11.8 
Deferred COVID-19 costs - recovered over a five-year period through August 2028 (b)
10.2 13.0 
Storm damage costs, including hurricane costs - recovered through securitization and retail rates (Note 2 - Storm Cost Recovery Filings with Retail Regulators and Note 5 - Entergy New Orleans Securitization Bonds - Hurricane Isaac)
4.0 3.9 
Unamortized loss on reacquired debt - recovered over term of debt
0.5 0.8 
Other20.7 24.0 
Entergy New Orleans Total (c)
$157.0 $182.4 
Schedule of Regulatory Liabilities [Table Text Block]
Entergy New Orleans
20242023
 (In Millions)
Credits from resolution of the 2016-2018 IRS audit - to be returned to customers over a 25-year period beginning January 2025 (Note 3)
$138.0 $60.0 
Refund from System Energy settlement with the City Council - returned to customers over a 25-year period beginning September 2024 (Note 2)
64.7 — 
Refund from System Energy settlement with the City Council - return to customers to be determined (Note 2)
32.0 — 
Retail rate rider over-recovery - refunded through rate riders as rates are redetermined annually
16.3 20.1 
Sale-leaseback and depreciation refunds - returned to customers over a 10-year period beginning September 2023 (Note 2)
5.2 9.8 
Other4.5 0.5 
Entergy New Orleans Total (b)
$260.7 $90.4 
Schedule of Deferred Fuel Costs [Table Text Block] The table below shows the amount of deferred fuel costs as of December 31, 2024 and 2023 that each Utility operating company expects to recover (or return to customers) through fuel mechanisms, subject to subsequent regulatory review.
 20242023
 (In Millions)
Entergy Arkansas
($45.2)($88.3)
Entergy Louisiana (a) (b)$163.4 $192.9 
Entergy Mississippi($126.3)($130.6)
Entergy New Orleans (a) (b)$8.0 $10.2 
Entergy Texas($59.3)$139.0 

(a)Includes $168.1 million in both years for Entergy Louisiana and $4.1 million in both years for Entergy New Orleans of fuel, purchased power, and capacity costs, which do not currently earn a return on investment and whose recovery periods are indeterminate but are expected to be recovered over a period greater than twelve months.
(b)Includes $0.7 million at Entergy Louisiana and $4.9 million at Entergy New Orleans as of December 31, 2024 of deferred fuel assets related to the respective natural gas distribution businesses classified as held for sale and included within “Current assets held for sale” on the respective consolidated balance sheets. See Note 14 to the financial statements for further discussion of the planned sale of the Entergy New Orleans and Entergy Louisiana natural gas distribution businesses and the classification as held for sale.
Opportunity Sales Proceeding [Table Text Block] Refunds and interest in the following amounts were paid by Entergy Arkansas to the other operating companies in December 2018:
 Total refunds including interest
Payment/(Receipt)
 (In Millions)
PrincipalInterestTotal
Entergy Arkansas$68$67$135
Entergy Louisiana($30)($29)($59)
Entergy Mississippi($18)($18)($36)
Entergy New Orleans($3)($4)($7)
Entergy Texas($17)($16)($33)
Entergy Texas [Member]  
Schedule of Regulatory Assets [Table Text Block]
Entergy Texas
 20242023
 (In Millions)
Storm damage costs, including hurricane costs - recovered through securitization and retail rates (Note 2 - Storm Cost Recovery Filings with Retail Regulators and Note 5 - Entergy Texas Securitization Bonds - Hurricane Laura, Hurricane Delta, and Winter Storm Uri)
$286.5 $297.3 
Removal costs (Note 9)
102.3 77.5 
Pension & postretirement costs (Note 11 - Qualified Pension Plans, Other Postretirement Benefits, and Non-Qualified Pension Plans) (a)
62.9 85.6 
Advanced metering system surcharge for residential customers - recovered through December 2029
39.7 20.2 
Pension & postretirement benefits expense deferral - recovered through retail rates (Note 2 - Retail Rate Proceedings and Note 11 - Entergy Texas Reserve)
15.0 32.7 
Retired electric meters - recovered through retail rates (Note 2 - Retail Rate Proceedings)
10.9 18.8 
Neches and Sabine costs - recovered over a 10-year period through September 2028
9.2 11.6 
Unamortized loss on reacquired debt - recovered over term of debt
7.6 8.3 
Rate case depreciation relate back deferral - recovered over a six-month period beginning January 2024 (Note 2 - Retail Rate Proceedings)
— 27.6 
Other15.6 17.0 
Entergy Texas Total$549.7 $596.6 
Schedule of Regulatory Liabilities [Table Text Block]
Entergy Texas
 20242023
 (In Millions)
Retail rate rider over-recovery - return to customers to be determined
$12.2 $23.8 
Retail refunds - return to customers to be determined
6.2 6.2 
Rate case settlement relate back - amortized over a six-month period beginning January 2024 (Note 2 - Retail Rate Proceedings)
— 10.3 
Other 0.3 2.7 
Entergy Texas Total$18.7 $43.0 
Schedule of Deferred Fuel Costs [Table Text Block] The table below shows the amount of deferred fuel costs as of December 31, 2024 and 2023 that each Utility operating company expects to recover (or return to customers) through fuel mechanisms, subject to subsequent regulatory review.
 20242023
 (In Millions)
Entergy Arkansas
($45.2)($88.3)
Entergy Louisiana (a) (b)$163.4 $192.9 
Entergy Mississippi($126.3)($130.6)
Entergy New Orleans (a) (b)$8.0 $10.2 
Entergy Texas($59.3)$139.0 

(a)Includes $168.1 million in both years for Entergy Louisiana and $4.1 million in both years for Entergy New Orleans of fuel, purchased power, and capacity costs, which do not currently earn a return on investment and whose recovery periods are indeterminate but are expected to be recovered over a period greater than twelve months.
(b)Includes $0.7 million at Entergy Louisiana and $4.9 million at Entergy New Orleans as of December 31, 2024 of deferred fuel assets related to the respective natural gas distribution businesses classified as held for sale and included within “Current assets held for sale” on the respective consolidated balance sheets. See Note 14 to the financial statements for further discussion of the planned sale of the Entergy New Orleans and Entergy Louisiana natural gas distribution businesses and the classification as held for sale.
Opportunity Sales Proceeding [Table Text Block] Refunds and interest in the following amounts were paid by Entergy Arkansas to the other operating companies in December 2018:
 Total refunds including interest
Payment/(Receipt)
 (In Millions)
PrincipalInterestTotal
Entergy Arkansas$68$67$135
Entergy Louisiana($30)($29)($59)
Entergy Mississippi($18)($18)($36)
Entergy New Orleans($3)($4)($7)
Entergy Texas($17)($16)($33)
System Energy [Member]  
Schedule of Regulatory Assets [Table Text Block]
System Energy
 20242023
 (In Millions)
Asset retirement obligation - recovery dependent upon timing of decommissioning of nuclear unit (Note 9) (b)
$224.8 $222.0 
Pension & postretirement costs (Note 11 - Qualified Pension Plans and Other Postretirement Benefits) (a)
104.4 121.6 
Removal costs - recovered through depreciation rates (Note 9)
96.9 102.1 
Unamortized loss on reacquired debt - recovered over term of debt
0.4 0.7 
System Energy Total$426.5 $446.4 
Schedule of Regulatory Liabilities [Table Text Block]
System Energy
 20242023
 (In Millions)
Unrealized gains on nuclear decommissioning trust funds (Note 16) (a)
$702.8 $560.6 
Entergy Arkansas’s accumulated accelerated Grand Gulf amortization - will be returned to customers when approved by the APSC and the FERC
44.4 44.4 
Complaints against System Energy - potential future refunds (Note 2)
— 177.9 
System Energy Total$747.2 $782.9 
Entergy Mississippi [Member]  
Schedule of Regulatory Assets [Table Text Block]
Entergy Mississippi
 20242023
(In Millions)
Removal costs (Note 9)
$184.8 $188.0 
Retail rate deferrals - recovered through formula rates or rate riders as rates are redetermined annually
162.5 192.8 
Pension & postretirement costs (Note 11 - Qualified Pension Plans, Other Postretirement Benefits, and Non-Qualified Pension Plans) (a)
112.1 127.6 
Qualified pension settlement cost deferral - recovered through June 2047 (Note 11 - Qualified Pension Settlement Cost)
29.1 32.0 
Asset retirement obligation - recovery dependent upon timing of shutdown of non-nuclear power plants and solar facility (Note 9) (a)
9.4 6.8 
Unamortized loss on reacquired debt - recovered over term of debt
9.1 10.0 
Attorney General litigation costs - recovered over a six-year period through March 2026 (b)
6.0 10.9 
Other12.8 11.0 
Entergy Mississippi Total$525.8 $579.1 
Schedule of Regulatory Liabilities [Table Text Block]
Entergy Mississippi
20242023
 (In Millions)
Deferred tax equity partnership earnings (Note 1)
$37.5 $30.5 
Retail rate rider over-recovery - refunded through formula rate or rate riders as rates are redetermined annually
12.2 2.4 
Other postretirement benefits (Note 11 - Entergy Mississippi Other Postretirement Benefits)
7.4 — 
Other2.4 0.8 
Entergy Mississippi Total$59.5 $33.7 
Schedule of Deferred Fuel Costs [Table Text Block] The table below shows the amount of deferred fuel costs as of December 31, 2024 and 2023 that each Utility operating company expects to recover (or return to customers) through fuel mechanisms, subject to subsequent regulatory review.
 20242023
 (In Millions)
Entergy Arkansas
($45.2)($88.3)
Entergy Louisiana (a) (b)$163.4 $192.9 
Entergy Mississippi($126.3)($130.6)
Entergy New Orleans (a) (b)$8.0 $10.2 
Entergy Texas($59.3)$139.0 

(a)Includes $168.1 million in both years for Entergy Louisiana and $4.1 million in both years for Entergy New Orleans of fuel, purchased power, and capacity costs, which do not currently earn a return on investment and whose recovery periods are indeterminate but are expected to be recovered over a period greater than twelve months.
(b)Includes $0.7 million at Entergy Louisiana and $4.9 million at Entergy New Orleans as of December 31, 2024 of deferred fuel assets related to the respective natural gas distribution businesses classified as held for sale and included within “Current assets held for sale” on the respective consolidated balance sheets. See Note 14 to the financial statements for further discussion of the planned sale of the Entergy New Orleans and Entergy Louisiana natural gas distribution businesses and the classification as held for sale.
Opportunity Sales Proceeding [Table Text Block] Refunds and interest in the following amounts were paid by Entergy Arkansas to the other operating companies in December 2018:
 Total refunds including interest
Payment/(Receipt)
 (In Millions)
PrincipalInterestTotal
Entergy Arkansas$68$67$135
Entergy Louisiana($30)($29)($59)
Entergy Mississippi($18)($18)($36)
Entergy New Orleans($3)($4)($7)
Entergy Texas($17)($16)($33)
Entergy Arkansas [Member]  
Schedule of Regulatory Assets [Table Text Block]
Entergy Arkansas
 20242023
 (In Millions)
Asset retirement obligation - recovery dependent upon timing of decommissioning of nuclear units or shutdown of non-nuclear power plants and solar facilities (Note 9) (a)
$693.0 $639.1 
Pension & postretirement costs (Note 11 - Qualified Pension Plans, Other Postretirement Benefits, and Non-Qualified Pension Plans) (a)
433.3 536.6 
Removal costs (Note 9)
337.9 319.7 
Qualified pension settlement cost deferral - recovered through June 2047 (Note 11 - Qualified Pension Settlement Cost)
75.8 84.1 
Deferred COVID-19 costs - recovered over a 10-year period through December 2033
35.1 39.0 
Retired electric meters - recovered over a 15-year period through March 2034
32.8 36.3 
Storm damage costs - recovered through retail rates
29.8 33.1 
Unamortized loss on reacquired debt - recovered over term of debt
18.6 19.9 
Formula rate plan historical year rate adjustment (Note 2 - Retail Rate Proceedings) (b)
15.5 — 
Retail rate deferrals - recovered through rate riders as rates are redetermined annually (b)
13.6 24.9 
ANO Fukushima and Flood Barrier costs - recovered through retail rates through February 2026 (b)
2.1 3.8 
Opportunity sales - (Note 2 - Entergy Arkansas Opportunity Sales Proceeding) (b)
— 131.8 
Other12.6 17.1 
Entergy Arkansas Total$1,700.1 $1,885.4 
Schedule of Regulatory Liabilities [Table Text Block]
Entergy Arkansas
 20242023
 (In Millions)
Unrealized gains on nuclear decommissioning trust funds (Note 16) (a)
$761.3 $621.6 
Deferred tax equity partnership earnings (Note 1)
32.4 27.4 
Retail rate rider over-recovery - refunded through rate riders as rates are redetermined annually
27.9 10.6 
Refund from System Energy settlement with the APSC - refunded through a rate rider as rates are re-determined periodically (Note 2)
8.2 93.0 
Internal restructuring guaranteed customer credits - returned to customers over a six-year period through December 2024
— 6.6 
Other1.4 — 
Entergy Arkansas Total$831.2 $759.2 
Schedule of Deferred Fuel Costs [Table Text Block] The table below shows the amount of deferred fuel costs as of December 31, 2024 and 2023 that each Utility operating company expects to recover (or return to customers) through fuel mechanisms, subject to subsequent regulatory review.
 20242023
 (In Millions)
Entergy Arkansas
($45.2)($88.3)
Entergy Louisiana (a) (b)$163.4 $192.9 
Entergy Mississippi($126.3)($130.6)
Entergy New Orleans (a) (b)$8.0 $10.2 
Entergy Texas($59.3)$139.0 

(a)Includes $168.1 million in both years for Entergy Louisiana and $4.1 million in both years for Entergy New Orleans of fuel, purchased power, and capacity costs, which do not currently earn a return on investment and whose recovery periods are indeterminate but are expected to be recovered over a period greater than twelve months.
(b)Includes $0.7 million at Entergy Louisiana and $4.9 million at Entergy New Orleans as of December 31, 2024 of deferred fuel assets related to the respective natural gas distribution businesses classified as held for sale and included within “Current assets held for sale” on the respective consolidated balance sheets. See Note 14 to the financial statements for further discussion of the planned sale of the Entergy New Orleans and Entergy Louisiana natural gas distribution businesses and the classification as held for sale.
Opportunity Sales Proceeding [Table Text Block] Refunds and interest in the following amounts were paid by Entergy Arkansas to the other operating companies in December 2018:
 Total refunds including interest
Payment/(Receipt)
 (In Millions)
PrincipalInterestTotal
Entergy Arkansas$68$67$135
Entergy Louisiana($30)($29)($59)
Entergy Mississippi($18)($18)($36)
Entergy New Orleans($3)($4)($7)
Entergy Texas($17)($16)($33)